# Periods and phase shift?

• Oct 18th 2012, 03:21 PM
M670
Periods and phase shift?
Let http://webwork.mathstat.concordia.ca...db345330c1.png.
What is the amplitude?
What is the period?
What is the phase shift?

I put 3pi as my period because I believe it would be 2pi/6pi which is 3 pi?
and the phase shift I thought it was 6e4, but thats wrong and I don't know why ?
• Oct 18th 2012, 03:43 PM
skeeter
Re: Periods and phase shift?
$y = A\sin(Bx + C) + D$

$|A|$ = amplitude

$\frac{2\pi}{|B|}$ = period

$\frac{C}{B}$ = phase shift

$D$ = vertical shift

btw, work on your division skills ...

$\frac{2\pi}{6\pi} = \frac{1}{3}$
• Oct 18th 2012, 05:12 PM
M670
Re: Periods and phase shift?
Quote:

Originally Posted by skeeter
$y = A\sin(Bx + C) + D$

$|A|$ = amplitude

$\frac{2\pi}{|B|}$ = period

$\frac{C}{B}$ = phase shift

$D$ = vertical shift

btw, work on your division skills ...

$\frac{2\pi}{6\pi} = \frac{1}{3}$

Yes my division was off, but I am unable to get the phase shift would it not be 6e^4 over 6pi ?
• Oct 18th 2012, 05:17 PM
skeeter
Re: Periods and phase shift?
Quote:

Originally Posted by M670
Yes my division was off, but I am unable to get the phase shift would it not be 6e^4 over 6pi ?

$\frac{e^4}{\pi}$
• Oct 18th 2012, 06:02 PM
M670
Re: Periods and phase shift?
i came to that conclusion earlier but It came back as being wrong?
• Oct 19th 2012, 03:10 AM
skeeter
Re: Periods and phase shift?
Quote:

Originally Posted by M670
i came to that conclusion earlier but It came back as being wrong?

were you also required a direction for the phase shift?
• Oct 19th 2012, 10:50 AM
M670
Re: Periods and phase shift?
I was not required to give a direction just the value of the phase shift
• Oct 19th 2012, 01:49 PM
skeeter
Re: Periods and phase shift?
try $-\frac{e^4}{\pi}$ ... see what happens